Effect of ion mass and charge State on transport of vacuum arc plasmas through a biased magnetic filter
Effect of ion mass and charge State on transport of vacuum arc plasmas through a biased magnetic filter
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DOI：
10.1109/tps.2004.826363
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发表时间：
2003-12
影响因子：
1.5
通讯作者：
Eungsun Byon;Jong-Kuk Kim;Sik-Chol Kwon;A. Anders
中科院分区：
文献类型：
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作者：
Eungsun Byon;Jong-Kuk Kim;Sik-Chol Kwon;A. Anders
利用脉冲阴极弧源，实验研究了离子质量和电荷状态对等离子体通过90/spl °/-弯曲磁过滤器输运的影响。选择石墨、铜和钨作为试验材料。滤波器是一个弯曲的铜线圈，通过低欧姆的“自偏置”电阻器两端的电压降偏置。离子传输通过引导电场完成，其电势形成由过滤器线圈的磁引导场形成的“槽”。通过测量过滤的离子电流和确定粒子系统系数来进行评估，粒子系统系数可以定义为过滤的离子电流除以平均离子电荷状态与电弧电流的比率。结果表明，随着离子质荷比的增大，离子电流和粒子系统系数减小。这一结果可以定性地解释一个非常简单的模型的离子传输的基础上补偿的离心力与导向电位槽相关联的电力。
The effect of ion mass and charge state on plasma transport through a 90/spl deg/-curved magnetic filter is experimentally investigated using a pulsed cathodic arc source. Graphite, copper, and tungsten were selected as test materials. The filter was a bent copper coil biased via the voltage drop across a low-ohm, "self-bias" resistor. Ion transport is accomplished via a guiding electric field, whose potential forms a "trough" shaped by the magnetic guiding field of the filter coil. Evaluation was done by measuring the filtered ion current and determination of the particle system coefficient, which can be defined as the ratio of filtered ion current, divided by the mean ion charge state, to the arc current. It was found that the ion current and particle system coefficient decreased as the mass-to-charge ratio of ions increased. This result can be qualitatively interpreted by a very simple model of ion transport that is based on compensation of the centrifugal force by the electric force associated with the guiding potential trough.